Question

我想从以下字符串中删除给定值（例如1），而无需拆分或使用XML功能。

/* input:  */ @ObjectValue = '1,121,4,5,1,111,131,1'
/* output: */ '121,4,5,111,131'

Answer 1

我认为最简单的方法是：

SELECT TRIM(',' from REPLACE(',' + @ObjectValue  + ',', ',1,', ','))

TRIM()在旧版本的SQL Server中不可用。一种方法是用空格替换逗号并使用可用的修剪函数：

SELECT REPLACE(LTRIM(RTRIM(REPLACE(REPLACE(',' + @ObjectValue + ',', ',1,', ','), ',', ' '))), ' ', ','),

Answer 2

您需要将列表中的定界符加倍，以使1,1,1变成,1,,1,,1,。然后替换所有,1,并随后进行清理：

SELECT ObjectValue, REPLACE(
    LTRIM(RTRIM(
        REPLACE(' ' + REPLACE(ObjectValue, ',', '  ') + ' ', ' 1 ', '')
    )), '  ', ','
)
FROM (VALUES
    ('1'),
    ('1,1'),
    ('1,1,1'),
    ('0,1,0'),
    ('0,1,1,0'),
    ('0,1,1,1,0'),
    ('0,1,0,1,0'),
    ('1,0,0,1,0,0,1,1,0,1,0,1,1,1,1,1,0,1,0,0,1,1,0,1,0,1,0,1,0,1')
) AS v(ObjectValue)

Answer 3

-- SSMS 2017
DECLARE @ObjectValue VARCHAR(100) = '1,121,4,5,1,111,131,1'
SELECT TRIM(',' FROM REPLACE(REPLACE(',' + @ObjectValue  + ',', ',1,', ','),',1,', ','))

-- SSMS 2016 or earlier 

    DECLARE @Replacetxt VARCHAR(MAX)

    SET @ObjectValue=REPLACE(REPLACE(','+@ObjectValue+',', ',1,', ','), ',1,', ',') --Replace ',1,' with ','

    SET @Replacetxt=REVERSE(SUBSTRING(@ObjectValue, PATINDEX('%[^,]%', @ObjectValue), LEN(@ObjectValue))) -- Remove comma from starting and reverse string

    SELECT REVERSE(SUBSTRING(@Replacetxt, PATINDEX('%[^,]%', @Replacetxt), LEN(@ObjectValue))) -- Remove comma from ending and reverse string

从逗号分隔的字符串中删除所有特定值的实例

3 个答案: